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zvonat [6]
3 years ago
10

What is the value of 5a + 7b if a = 4 and b = 3?? a : 41 b : 12 c : 43 d : 35

Mathematics
2 answers:
MAXImum [283]3 years ago
8 0
<h3>Answer:</h3><h3>41</h3><h3>Step-by-step explanation:</h3><h3>multiplication and addition</h3><h3>5x4=20</h3><h3>7x3=21</h3><h3>20+21=41</h3>
yulyashka [42]3 years ago
6 0

Answer:

41

Step-by-step explanation:

the answer is a:41

this is because 5 times 4 is 20 and 7 times 3 is 21

so 20+21 is 41

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622.2 miles 1,001.3 kilometers

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Good evening! Can you please help me solve this.
Stella [2.4K]

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Step-by-step explanation:

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Question 3
Fiesta28 [93]
Answer: y = -6x + 2

m = y_2 - y_1
/ x_2 - x_1

-10 - 8
/ 2 - (-1)

= -18/3 = -6

m (slope) = -6

y = mx + b
y = -6x +b

Find b using (-1,8)
y = -6x +b
8 = -6(-1) + b
8 = 6 + b
-6 -6
2 = b

Final answer: y = -6x + 2

To check using one of the points: (-1,8) or (2,-10)
y = -6x + 2
-10 = -6(2) + 2
-10 = -12 + 2
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This is a true statement.
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2 years ago
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VMariaS [17]
The slope is the slope :D
4 0
3 years ago
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1.) What is the best approximation of the solution to the system to the nearest integer values?
melisa1 [442]

<u>Part 1)</u> we have

5x+2y=16 ------> equation A

x+3y=12

x=12-3y ------> equation B

Substitute the equation B in equation A

5[12-3y]+2y=16

60-15y+2y=16

13y=44

y=44/13=3.38

Find the value of x

x=12-3(44/13)=1.85

the best approximation is the point (2.3)

therefore

<u>the answer Part 1) is the option C</u>

(2.3)

<u>Part 2) </u>we have

y=-x-2 ------> equation A

y=3x+2 ------> equation B

equate equation A and equation B

-x-2=3x+2

4x=-4

x=-1

Find the value of y

y=-(-1)-2=-1

the solution is the point (-1,-1)

therefore

<u>the answer Part 2) is </u>

(-1,-1)


5 0
3 years ago
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